Tank-car discharge-valve mechanism



March 19, 1929.

J. J. MCBRIDE TANK CAR DISCHARGE VALVE MECHANISM Filed June 29.

f5 Sheets-Sheet 1 TTRNEY March 19, 1929. J. J. McBRmE TANK pAR DISCHARGE VALVE MEcHANIsM :5 sheets-Smml 2 Filed June 29, 1921 WET /N vf/v TUR:

March 19, 1929. 1. J. MCBRID TANK CAR DISCHARGE VALVE MECHANISM Filed June 29. v1921 3 Sheets-Shadi, 3

/A/Vf/vTo/e: John c7. McBride WN. m

/WTORNEX Patented Mar. 19, 122.3.

UNITED STATESY PATENT OFFICE.

JOHN J. MGBRVIDE, F BAYONNE, NEW JERSEY, ASSIGNOR TO AMERICAN CAR ANI) FOUNDRY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

TANK-CAR- DISCHARGE-VALVE MEOI-IANISM.

Application led June 29,

Reference is had to fthe accompanying drawings, which illustrate the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modications thereof within the scope of the claims will occurto persons skilled in the art.

In said drawings:

Fig. 1 is a central vertical section taken on the line 1-1 of Fig. 3 of my improved tank car discharge valve mechanism, the valve being shown in closed position;

Fig. 2is a similar view taken on the line 2-2 of Fig. 3, the valve being shown in open position;

Fig. 3 is a horizontal section taken on line 3- 3 of Fig. 1;

Y F ig. 4 is a horizontal section taken on line 4 4 of Fig. 1 n

Fig. 5 is a horizontal section taken on line 5-5 of Fig. 2;

Fig. 6 is a view of one of the bronze spring seating rings; and

Fig. 7 is a fragmentary view showing a modification in which a single spring ring is used.

It is an object of my invention to provide an improved tank car discharge valve of the self grinding type, and it is also an object of my invention to provide a discharge valve mechanism comprising a plurality of valve portions adapted to operate as valves and a movable seat for one of the valve portions.

In the drawings, 1 designates a discharge outlet casting riveted or otherwise secured to the tank sheet 2 and having a discharge opening 3. In the upper end of the discharge opening 3 and having a screwthreaded engagement with the outlet casting 1 is a tubular valve cage 4 having inlet openings 5 inl the barrel 6 of the cage and an outlet opening 7 surrounded by a valve seat 8 formed in the end 9. of the cage.

Slidably mounted in the cage 4 is a tubular valve portion 10 having a stem 11 adapted to project beyond the cake 4. The stein 11 is tubular and screw threaded for part of its length, the opening in the stem being circular for part of its length so as to receive the cylindrical head 12 onthe rectangular stem 13, the body portion 14 of which its loosely in a rectangular opening in the stein 11, the movement of the stem 13 in one direction being limited by the engagement-of the head 12 with to receive the body portion 14 of 1921. serial No. 481,375.

the shoulder 15 formed at the unction of the openings in the stem. Reenforcing ribs 16 aid in securing the stem 11 to the body portion of the valve portion 10.

Mounted on the reduced lower end of the stem 13 is a valve portion 17 held in place by nut 18 and having a projecting portion 19 provided with a rectangular opening adapted thc stein 13. The valve portion 17 is provided with faces 2Q and 21, the face 20 being adapted to engage with the seat 8 on the valve cage 4 while the face 21 is engaged by the face 22 on the spring ring 23. The spring ring 23 is substantially triangular in cross section and with its face 22 engaging the face 21 it has a face 24, substantially horizontal when in use, adapted to be engaged by a face 25 of a similar ring 26 which also has a face 27 adapted to be engaged by the face 28 on the tubular valve portion 10.

A The rings 23 and 26 are each open at one side as shown in Figs. 4, 5 and 6, the planes of the openings being at an angle to the radii of the rings at the points of opening so that as the rings are expanded by the forcing together of the valve portions 10 and 17, the ends of the rings will not be spread apart at the openings but will be kept together and so prevent leakage. The pairs of rings are assembled with the openings diametrically opposite andthe rings are kept with the openings so positioned by means of a pin 29 in one ring engaging in an opening 30 in the other ring.

A capnut 31, threaded on to the cage 6 and secured in place by a set screw 32 engaging in a slot 33, is provided with an opening 34 in which is threaded the stem 11 of the valve portion 10. An operating shaft 35 is inserted in the end of the stem 11 and secured in place by bolt 36 and nut 37.

In the modified construction shown in Fig. 7, only one spring ring 38 is used and the face 39 on the tubular valve portion 10 is adapted to engage with the substantially horizontal face 40 on the ring 38.

Assuming the valve closed as shown in Fig. 1, rotation of the shaft 35 will cause a rotation of the stem 11 and valve portion 10. Rotation of the stem 11 causes the valve portion 1() to be raised from its seat on the ring 26 permitting the rings 26 and 23 to spring away from their engagement with the inner wall of the valve cage 4, and rotates the valve portion 17 upon the seat 8. The valve portion 17 llO Will be rotatednpon' the seat- 8 until the shoulder 15 engages the head 12 ivhereupon the valve portion 17 Will be moved from the seat 8. To close', the valve, the shaft is rotated in the opposite direction, rotating the valve.V

portions 10 and 17 and lowering them inthe caffe 4 until the valve )orti'on v17' enoaefes the' D b D seat 8, the valve portion 17 ythen being rotated Y,the Wall of the cagecll and, at the saine time,

exert a gradually increasing pressure upon the valve' portion l''Idu-ring its movement upon the seat 8. lIt 1will be noted that in the closed position of the'valve, the valve portion 10 isinengagement with the ring 2G below the bottom level of the openings 5 in the valve cage el and aids the valve portion 17 in cutting oil theffloiv through the discharge opening o i' theoutletcasing and incase oit damage to the valve portion 17 or the failure of the valve portion 1T toV scat properly, the valve portion lOserves as an. emergency valve and controls the now through the discharge outlet casing by its engagement with theY split ring on which it seats andwhich it will spread into engagement with the cage preventing leakage between the valve portion 10 and valve cage.

What I claim is:l 1. In a valve mechanism, a casing, a valve 'cage having-a 'seat mounted in said casing, a

valve portion adapted to be rotated on said seat, a second valve port-ion adapted to operate said lirst valve portion and having movement relatively thereto and means adapted vto be engaged vvith said valve cage by the relative movement of said valve portions.

2. yIn a discharge valve, a casing having a discharge outlet, a valve cage having a valve seat mounted in said outlet, a valve portion adapted to engage said seat v.to control said outlet, a spring ring carried by said valve portion and a second valve portion carrying said `first valve portion and adapted to rotate said nrstlvalve portion on lsaid seat and to engagel lsaid spring ring to force said iirst valve portion to said seat. y

' 3. In a discharge valve, a casing having a discharge outlet, a valve cage `having a valve 'seat Vmounted in said casing-7 a valve portion engaging saiduseat to control said outlet, a spring ring vcarried by said valve portion and a vsecond valve portion connected to effect a predetermined rotation oi' said first valve portion on said valve seat and to force said spring ring into Contact with said Hrst valveportion and said valvecage.

4. The combination Withavalve cage havin va valve seaaa valve portion mounted in said cageand having a tubular .stem threaded 1l an` opening insaid cage, saidvalve portion f having a tubular body and ivebs'securing said bodyv and stem, asecond valve portion cooperating With said valve seat and having a rectangular stem slidably engaging a correspondingly shaped portion ot the stem of said lirst valve portion, a spring ring loosely mounted between said valve portions and operating means for said valve portions sccured in the stemof said first valve portion.

5.' The combination with a discharge outlct` casing of a valve cagehaving a valve seat mounted in said casing, a valve portion comprising a tubular body, a tubular stem threaded in an opening in saidcage and vivebs uniting said body and stem, a second valve portion comprising a body cooperating with the valve seat and a headed angular stem slidably engaging a correspondingly shaped portion of said tubular stem whereby said valve portions are connected to rotate siinultaneously .While relatively movable, and a spring ring loosely mounted between said valveportions and expanded into engagement with said cage by the seating of said valve portions. Y

6. The combination with a discharge outlet casing of a valve cage having a valve seat mounted in said casing, a valveportion mounted in said valve cage comprising a threaded tubular stem engaging in an opening insaid cage and a tubular body surroundingsaid stem and connected thereto byfwebs, a second valve portioncomprising a body coo erating With the valve seat to control sait outlet, and a headed angular stem slidably engaging a correspondingly shaped portion of said tubular stem, and sprimgV means loosely mounted between said valve portions and having surfaces cooperating with surfaces on said valve portions and expanded by the relative movement of said bodies into engagement with said cage.

7. In a valve, a valve portion comprising a tubular body having a seating surface and a tubular stem surrounded by said body and secured thereto vby Webs, a second valveportion comprising a body having a seating surface anda headed angular' stem having slidable engagement with a correspondingly shaped portion of said tubular stem whereby said valve portions are relatively movable longitudinally of the stems and are connected for simultaneous rotation, and spring means loosely mounted between said valve portions and cooperating with the seating sur-laces of said valve portions to beexpanded upon relative movement of said valve portions.

8. In a valve, a valve portionA comprising a tubular stemV having an angular chamber therein and `al tubular body surrounding said stem and joined thereto by spaced integral Webs, a second valve portion'comprising a headed angular stem slidably mounted in said chamber and projecting therefrom and a body removably A.mounted on said angular stem and having a correspondingly shaped recess receiving said angular stein, and spring llO means loosely mounted between said bodies and cooperating therewith in the operation ot said valve. e

9. In a discharge valve7 a casing having a discharge outlet, a valve cage having a valve seat mounted in said outlet, a valve portion for engaging' said seat to control said outlet, a second valve portion having a tubular stem threaded in an opening in said cage7 a stem for said first valve portion having a head slidably mounted in the stem of said second valve portion and connecting said valve portions for simultaneous rotation, and a spring ring mounted between said valve portions and cooperating therewith.

l0. In a discharge valve, a casing having a discharge outlet, a valve cage having a valve seat mounted in said outlet, a valve portion for engaging said seat to control said outlet, a second valve portion carrying said first valve portion and connected to rotate said first valve portion on said seat, and a spring ring loosely mounted between said valve portions, said second valve portion having a tubular stem threaded in an opening in said cage and said first valve portion having a ystem telescoping with the stem of said second valve portion.

In witness whereof I have hereunto set my hand.

JOHN J. MCBRIDE.

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